WTF Is It?!? Round 4

Every year around this time, I get an email from a friend obsessed with a fruit that, until recently, I'd never seen or tasted. He claims that the halcyon summers of his youth were saturated with the sugary tartness of this sublime edible. Since my friend doesn't seem to understand that there are literally hundreds of fruits and vegetables no longer available to the average consumer, thanks to corporate agribusiness, which breeds produce for characteristics that have nothing whatever to do with flavor (ie shelf-life, ease of transport, and resistance to pests), he continues to yearn for what he can't have... what he has irretrievably lost...